Pulsator for pneumatic milking.



C. V. HBNRIGHSEN. PULSATOR POR PNEUMATIG MILKING. APPLwATIoN FILED JAN.e, 1911.

1,045,402. Patented Nov. 26, 1912.

UNITED 'STATES or continuaran, nnNmAnx.

Specification of Letters Patent.

Application med mmm' e, 1911. senalirq; 601,079.

To all whom 'it may concern; Be it known that I, CHRISTIAN VALDEMARHENmoHsEN, of 134 Borgergade, Copenhagen, in the Kingdomof Denmark,mechanical engineer, and useful Improvements' in and Connected withPulsators for Pneumatic Milking, of which the following is aspecification, reference being had therein to the accompanying drawin jThis invention relates to im and connected with pulsators milking.

Pulsators for pneumatic milking are found defective inasmuch as thesmall metal slide, tap or valve body which, y alternately covering anduncovering the passage for the pneumatic motive power, serves to reversethe operative member of the pulsator, is not sufficiently reliable inaction, owin to the fact that itwears very soon, ecomes clogged withdust, requires lubricating and skilled attention. i

To remedy the said defects accordingto the present'invention the wall orwalls which at predetermined tiines cause the passage or passages of theIrespective 4pneumatic power or powers to be cut oil" are formed of nonmetallic soft material (caoutchouc gutta percha or india rubber). Thismaterial does not slide on other parts when moved to cut oli""but isfreed at one or a number of sides or moved in an axial direction intothe path of the pneumatic motive power rovements in or pneumatic deviceof this kind for instance may be used consistingV of an india rubber tiie which forms a part vof the l'iassagel of the motive power and isalternatelypinched together' with or without the insertlon of springs tocause a sudden cutting off or opening of t-he passage orifice for themotive power, just when the operative member takes up its end positions.

In the example shown in the drawing, it is assumed that the movement ofthe working member, say a diaphragm,is transmitted by means of a screwlike body, which is turned have invented certain newv L so that the pathis contractedor closed altogether,"`A`

by the diaphragm and causes a spring to be placed under tension -whichby suitable connections, operates on the soft material.

In the accompanying drawing-Figurc 1 is a verticalsection on line A-A ofFig. 2 through the pulsator with the new cut oli' device open. Fig. 2 aplan of Fig. l. Fig. 3 a longitudinal section with device closed, vandFig. 4 a vertical section on line B-B of Fig. 2 with device closed.Figs. 5 and 6 are views of details of another embodiment ofthisinvention showing respectively a verticalv section and a plan of thedevice the valve being shown closed-in Fig. 5 and open in Fig. 6.

In carrying out my invention and referring Vto Flgs'. 144,1 is theworking chamber, 2 the diaphragm, 3 the pulsator and'4 a bar twisted soas" to form a screw movable'to and fro inthe cylindrical bore 5 in thebody 3.

he screw 4 6 which 7 carries an eccentric stud 9 and has a central holeadapted to receive the` stud 10 at the end'of an arm 11. This arm has'asecond stud 12 and carries a roller 13. The studsl 9 and 12 are connected by a helical spring 14.

e vacuum duct 15 has connected to it at its outer end a pipe 16 and atits inner end a nozzle 17 for a flexible tube 18 which is located in thepath of the roller 13. By preference the nozzle 17 is so arranged thatthe flexible t-ube 18 when open forms an acute angle with the path ofthe roller 1 3 and therefore can be bent by the roller 13 about an anglegreater than 90 degrees.

To the top 8 is secured a cap 19 in which is an 4air port 20. The top 8has also a port 21 opening into the cap 19.

Immediately before the parts reach the position shown in Figs. 1 and 2,the vacuum l1n the working chamber 1 has operated, to

raise the diaphragm 2 and valve body 3 thereby turning the `screw 4 andits head 7, the'stud 9 describing the arc shown by arrow 22, Fig. 2. Themoment this position has been reached another movement is produced, thespring 14 which being under tension will draw the arm 11 in such amanner into the position shown in Figs. 3 and 4, in which the roller 13-presses or pinches the flexible tube 18 together. The air Which PatentedNov. ae, 19,12. A

valve body,

`valve independent of said valve body during the preceding vacuum periodwas sucked away toa greater amount than could enter through'the port 20,can now actfreely through the port 21;the diaphragm 2 and valve body 3will therefore be moved downward. At the close of this period all artswill thus occupy the positions shown in igs. 3 and 4, from whichositions however, the are at once'returned by the spring 14 whic againdraws the arm 11 back into the position shown in Figs. 1 and 2, wherebythe flexible pipe 18 is released and the exhausting of the workingchamber is allowed to commence again. j

The flexible tube 18 may out off either of the motive powers and alsothe atmosphere as well as the vacuum. To illustrate this action a vacuumconnection 16 is shown in Fig. 7, which communicates Yfreely with theinterior of the cap 19, so that by means of the port 21 the workinglchamber 1 is always in communication wlth the vacuum. In this case, ofcourse, it must be assumed that the bore 15al communicates with the atmosphere, so that when the'lexible tube 18b is in the position shown inFig. 7, it forms a passage forv the entering air. Further by means oftwo flexible tubes 18, 18* both motive powers may be alternately cut oi,for instance by causing the iexible Vtubes to cut oli the iniowin or theoutflowing air. This action is il ustrated in Fig. 8. The arm 11 whichat one time closes the iiexible tube 18 (for the outtlowing air or airremoved by the vacuum connection is shown connected with the arm 11. Thelatter closes'at the second period a second flexible tube 18 which mayform a passa e for the l l combmation wlth a casing open to theatinlowing air to the working cham er.

In the construction shown in Figs. 5 and 6, a piece of iexible tube 24is shown on the arm 11, the outer end 25 of which is of semi-circularcross-section, so that it will not touch the partof the flexible tube24: which in this case is intended to close the opening 23 for theinflowing air. AThis device is particularly suitable for cutting oimotive power which moves in the direction shown by the arrow 27 in Fig.6, while the flexible tube 18 above referred to is applicable forinflowing as well as for outiowlng air.

1. In pulsatorsfor pneumatic milking the combination with a casing opento the atmosphere and a pulsator valve body located` therein, of anactuating member connected to said valve body, a vacuum connection a orcontrolling the flow of air from said casin respectively 'through saidconnection an movable means adapted to be operated by the movements ofsa1d actuating member to periodically interrupt the flow of air fromsaid casing.

2. In pulsators for pneumatic milking the combination with a casing opento the atmosphere and a pulsator valve body located therein, of aiiexible diaphragm connected to'said valve body, a vacuum connection, aicxible'tube'for controlling the flow of air from said casing through'said vacuum connection, and movable means adaptedto be operated by themovements of said diaphragm to periodically move said tube to int-erru tthe fiow of air' from said casing.

3. n pulsators for pneumatic milking, the combination with a casing opento the atmosphere and a lpulsatOr valve body located therein, of a exlle diaphragm connected to said valve body, a vacuum connection, aflexible tube for controlling the iow of air from said casing throughsaid vacuum connection, and a movable arm lcoperatively connected withsaidvalve body and adapted to be actuated by the movements of saiddiaphragm to periodically close said iexible tube, thereby interruptingthe flow .of air from said casing.

4. In pulsators for pneumatic milking the combination with a casing opento the atmosphere and a pulsator valve bod located therein, of adiaphragm connecte to said valve body, a vacuum connection, a flexibletube controllingthe flow of4 air from said casin through said vacuumconnection, a mova le arm, and means connecting said movable arm withsaidV valve body, so as to cause said movablearm u on the downwardmovement of said valve ody to close said exible tube, therebyinterrupting the How of air from said casmg.

5. In pulsators for pneumatic milking the mosphere and a pulsator valvebody located therein, of a diaphragm connected to vsaid valve body, avacuum connection, a valve independent of said valve body for controllinthe flow of air from said casing through sai vacuum connection, movablemeans adapted to interrupt the flow of air from said casing and aconnecting member between said movable means and said valve body fortransmovable arm with said valve body to Ytransmit the periodicalmovements of said valve body to said arm.

7. In pulsators for pneumatic milking the combination wlth a casing opento the at susI able arm. y

` 8. In pulsators for pneumatic milking the combination with a casingopen to the atmosphere and a pulsator valve body located therein, of aflexible diaphragm connected to said valve body, a vacuum connection, aValve independent of said valve body, for controlling the'iow of airfrom said casing through said vacuum connection, a movable memberadapted to close said valve, a twisted bar and a spring connecting saidvalve body 'with said movable arm to transmit the movement of said valvebody to said movmosphere and a. pulsator valve body located thereln,l ofa dlaphragm connected to said valve body, a vacuum connection, afiexible tube for controlling the ow of air from said casing throughsaid vacuum connection, a twisted bar adapted to be operated by Asaidvalve body, a revoluble head on said bar, an arm mounted in said head toclose said ilexible tube, thereby interrupting the iow of air from saidcasing, and a spring for eiecting the movements of said arm 1n eachdirection.

In testimony that I claim the foregoing as my invention, I havesigned myname in presence of two subscrlbmg wltnesses.

CHRISTIAN VALDEMAR HENRICHSEN. itnesses: ERNEST BOUTARD, EMIL MoWEITzEN.

